JPH09160679A - Device for signal superposition power supply and device for two-way signal transmission between master equipment and slave equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a devices which attain signal superposition power supply and two-way signal transmission between the master equipment and portable slave equipment. SOLUTION: For signal transmission and power supply to the slave equipment 10, a transistor(TR) 15 of the slave equipment 10 is turned off, and a microcomputer (master) 2 turns on and off a switching element 4 to supply a signal superposed current to the slave equipment 10. The slave equipment 10 rectifies the current by a diode 13 and a smoothing capacitor 14 to uses the current as a power supply current and also as an input signal to a microcomputer (slave) 11. The signal from the slave equipment 10 turns on the switching element of the master equipment 1 to supply the power supply current to the slave equipment 10, and the microcomputer (slave) 11 turns on and off the TR 15 according to data to be sent to increase or decrease the voltage drop across the current detection resistance 6 of the master equipment 1. This is restored by a comparator 8 to a digital signal, and the microcomputer (master) 2 receives it as a signal from the slave equipment 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for superimposing digital signals between a master unit and a portable slave unit and a device capable of bidirectional digital signal transmission.

[0002]

2. Description of the Related Art In a game machine such as a pachinko machine or a slot machine, and particularly in a pachinko machine, data such as the number of balls, an ID number, a date, a time, etc.
It is recorded on a portable magnetic card, so-called prepaid card, and it is inserted into the card reading device provided on the pachinko machine, and the parent computer on the pachinko machine side reads the above data, for example, a rental ball. The system for controlling the supply of the number of balls, writing the number of balls supplied, and the date and time to the memory of the card, which is a child device, has been realized. Of course, it is well known that the prepaid card utilization system has been developed not only for gaming facilities but also for transportation and others.

By the way, in such a system, a microcomputer is also built in the portable unit to be carried, the data processing capacity and the recording capacity are increased, and bidirectional signal transmission between the master unit and the slave unit is possible. It is desired to do so, and various products that realize it have been developed. In these systems, the slave unit must also have a power source for the microcomputer, etc., or power must be supplied from the master unit. In consideration of portability of the slave unit, power supply from the master unit to the slave unit is required. Is preferably performed. Needless to say, it is desirable that the power supply and the bidirectional signal transmission between the master unit and the slave unit can be performed with the simplest structure possible.

Therefore, an object of the present invention is to provide a new and simple apparatus capable of supplying signal-superimposed power and bidirectionally transmitting signals between a master unit and a portable slave unit. It should be noted that the present invention is not limited to the above-mentioned examples or the examples described below, and can be applied to all of the signal superimposing power supply and the bidirectional signal transmission between the master unit and the portable slave unit. is there.

[0005]

In order to achieve the above object, a signal superimposing power supply device between a master unit and a slave unit according to the present invention is portable as a master unit and as a separate unit from the master unit. A device for supplying power by superimposing a signal with a slave unit, wherein the master unit turns on and off a power supply circuit, an output terminal, a switching element connected between them, and the switching element. A master unit side microcomputer for varying the output terminal voltage to make a signal, the slave unit, an input terminal mechanically contactable with the output terminal of the master unit, a slave unit side microcomputer, and these The signal conversion by the master unit is performed by the master unit side microcomputer to intermittently change the voltage of the high-level power supply current into two types of low-level voltages having different durations. Can be changed The signal separating means of the slave unit smoothes the power supply current whose level changes intermittently to supply power to the microcomputer of the slave unit side, and the slave unit from the power supply side of the rectifying unit. And a signal input line connected to an input port of the side microcomputer.

In order to achieve the above object, a bidirectional signal transmission device between a master unit and a slave unit according to the present invention is the signal superimposing power supply device according to claim 1, wherein a power supply circuit and a switching circuit of the master unit are provided. A current detection resistor is provided between the device and the device, and the device includes a device-side switching device that is connected between the power supply side of the rectifying means and the output port of the device-side microcomputer. In the state where the switching element of is turned on, the child side switching element is turned on and off according to the output signal of the child side microcomputer, and the conduction state of the power supply current from the parent machine via the input / output terminal is changed, The change state of the voltage drop due to the current detection resistance due to the energization variable state is detected by the master side microcomputer as a signal from the slave side microcomputer. And wherein the Rukoto.

[0007]

Embodiments and examples of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of a signal superposition power supply device and a bidirectional signal transmission device between a master unit and a slave unit according to the present invention, and FIGS. 2 and 3 are waveform diagrams showing the form of a transmission signal. .

In FIG. 1, reference numeral 1 denotes a master unit, which is mainly a microcomputer (hereinafter simply referred to as a microcomputer) including a CPU, a memory, an input / output unit, a DC power supply 3, a switching element 4, an input / output terminal 5, and a current detection. It consists of a resistor 6, an amplifier 7, and a comparator 8. The switching element 4 is connected in series between the DC power supply 3 and the input / output terminal 5 so as to be turned on / off under the control of the microcomputer (parent) 2, and the current detection resistor 6 is connected between the DC power supply 3 and the switching element 4. Are connected in series. The amplifier 7 and the comparator 8 are connected so as to amplify and compare the voltage drop across the current detection resistor 6 and input the same to the microcomputer (parent) 2.

The master unit 1 turns on / off the switching element 4 to turn on / off the current supply path between the DC power source 3 and the input / output terminal 5 in accordance with the content of the control signal from the microcomputer (parent) 2 to form an output signal current. To do. As shown in the waveform in FIG. 2, this output signal is turned on and off at full swing between + 5V and 0V to form two types of 0V periods having different durations. One is the L signal. In the example of FIG. 2, the period t when the H signal is set.
1 is 40 μsec, t2 between the H signal and the L signal is 1.2 msec, and the period t3 for the L signal is 80 μsec.

In the figure, reference numeral 10 denotes a slave unit, which is mainly a microcomputer (slave).
11, input / output terminal 12, diode 13, smoothing capacitor 14, transistor 15, signal input line 16 to the input port of microcomputer (child) 11 and control line connected from the output port of microcomputer (child) 11 to the base of transistor 15 It consists of 17. The microcomputer (child) 11 is, for example, EE-P.
It is preferable to have a built-in memory such as a ROM.

The diode 13, the smoothing capacitor 14 and the signal input line 16 constitute a signal separating means, of which the diode 13 and the smoothing capacitor 14 constitute a rectifying means, and the signal component from the on / off signal from the parent device 1 as described above. Is removed and smoothed, and power is supplied to the microcomputer (child) 11. The signal input line 16 includes an input / output terminal 12 and a diode 1.
3 and the on / off signal from the master unit 1 is input to the input port of the microcomputer (child) 11. Also this child machine 1
In 0, the transistor 15 is turned on / off by the microcomputer (child) 11, and thereby signal transmission to the master device 1 is performed. In addition, as shown in FIG.
The signal waveform from the master unit 1 to the master unit 1 is similar to the signal waveform from the master unit 1 to the slave unit 10 shown in FIG.

FIG. 4 shows an example of the child device 10, the parent device 1, and the child device 1.
An example of the 0 input / output terminal is shown. The child device 10 of this example is a coin-shaped device having a diameter of 30 mm and a thickness of about 5 mm, has a built-in microcomputer chip, etc., and has electrodes 12a of the input / output terminals 12 on the flat surfaces on both sides (only one is shown in the figure). It is exposed. The input / output terminal 5 of the master unit 1 is connected to the electrode 12a.
Power supply and signal transmission are performed by mechanically contacting the probe pins 5a, 5a connected to the. Of course, it is also possible to adopt other electrical connection structures involving mechanical contact, and also known or known optical transmission structures and the like.

Next, the input / output terminals 5 of the master unit 1 and the slave unit 10,
The operation of the present embodiment when the device 12 is mechanically connected by the above-described configuration will be described. First, base unit 1
From the slave unit 10 when transmitting signals from the slave unit to the slave unit 10 and supplying power.
2 is turned off, the switching element 4 is turned on / off in accordance with the signal content to be transmitted by the microcomputer (parent) 2 of the parent device 1, and a current superposed with a signal having a waveform as shown in FIG. Supply to the side. This current is rectified by the diode 13 and the smoothing capacitor 14 and supplied to the microcomputer (child) 11 as a power supply current,
Further, the data signal is directly supplied from the front side of the diode 13 to the microcomputer (child) 11 via the signal input line 16. The microcomputer (child) 11 writes this in the memory,
After receiving all the data, a signal indicating the completion of reception is returned to the master device 1 in the following manner.

Signal transmission from the handset 10 to the base 1 will be described. At this time, the switching element 4 of the base unit 1 is kept on, and the power supply current at the H level is supplied to the handset 10 as shown in FIG. On the slave unit 10 side, the microcomputer (child) 11 turns on / off its output port according to the content of the data to be transmitted, thereby turning on / off the transistor 15. Then, the current flowing from the front side of the diode 13 to the transistor 15 via the current limiting resistor 18 is turned on / off, and accordingly, the voltage drop across the current detection resistor 6 of the parent device 1 increases or decreases. This is amplified by the amplifier 7 and restored to a digital signal by the comparator 8, and the microcomputer (parent) 2 receives this as a data signal from the child device 10.

If, for example, an 8-bit machine is adopted as the microcomputer used in the master unit 1 and the slave unit 10 and 16 bytes of data are transmitted or received in one signal transmission / reception, this type of system is used. In the above, sufficient data transmission is possible, but of course, it is not limited thereto. Although not shown, the timing of power supply from the base unit 1 to the handset 10 and the start of signal transmission is determined by detecting that the handset 10 is inserted into the receiving slot of the base unit 1 by an appropriate means. It should be measured. Of course, other means such as various known and well-known means such as starting by detecting that a person holding the child device 10 stands in front of the parent device 1 with an appropriate sensor can be employed.

[0016]

The signal superimposing power supply device between the master unit and the slave unit according to claim 1 is as described above, and therefore, the digital signal is superimposed between the master unit and the portable slave unit. There is an effect that a new and simple device for power supply can be provided.

Since the bidirectional signal transmission device between the master unit and the slave unit according to claim 2 is as described above, a power supply device in which digital signals are superimposed between the master unit and the portable slave unit. And, there is an effect that a new and simple device capable of bidirectional digital signal transmission can be provided.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of a signal superimposing power supply device and a bidirectional signal transmission device between a master unit and a slave unit according to the present invention.

FIG. 2 is a waveform diagram of a transmission signal from the master unit to the slave unit of the apparatus of FIG.

FIG. 3 is a waveform diagram showing a power supply waveform (A) from the master unit during signal transmission from the slave unit to the master unit and a transmission signal waveform from the slave unit to the master unit in the apparatus of FIG.

FIG. 4 is a perspective view showing an example of a child device.

[Explanation of symbols]

 1 Master Unit 2 Microcomputer (Parent) 3 DC Power Supply 4 Switching Element 5 Input / Output Terminal 6 Current Detection Resistor 7 Amplifier 8 Comparator 10 Slave Unit 11 Microcomputer (Child) 12 Input / Output Terminal 13 Diode 14 Smoothing Capacitor 15 Transistor 16 Signal Input Line 17 Control line 18 Current limiting resistor

Claims (2)

[Claims] 1. An apparatus for supplying power by superimposing signals between a master unit and a slave unit that is separate and portable from the master unit, wherein the master unit includes a power supply circuit and an output. A terminal, a switching element connected between these terminals, and a master unit side microcomputer that varies the output terminal voltage to turn it into a signal by turning the switching element on and off, and the slave unit outputs the output of the master unit. An input terminal capable of mechanically contacting the terminal, a slave side microcomputer, and a signal separating means connected between them are provided, and the signal conversion by the master unit is performed at a high level by the master unit side microcomputer. The voltage of the power supply current is intermittently changed to two types of low-level voltage having different durations, and the signal separation means of the slave unit smooths the power supply current whose level changes intermittently to Child A signal between a master unit and a slave unit, comprising a rectifying means for supplying power to the machine side microcomputer and a signal input line connected from the power source side of the rectifying means to an input port of the slave side microcomputer. Superposed power supply device. 2. The signal superimposing power supply device between the master unit and the slave unit according to claim 1, further comprising a current detection resistor between a power supply circuit of the master unit and a switching element, wherein the slave unit is the rectifying means. Of the slave side microcomputer connected to the output port of the power source side of the slave side microcomputer, the output signal of the slave side microcomputer with the switching element of the master side turned on. Accordingly, the switching device on the slave unit side is turned on / off to change the energization state of the power supply current from the master unit via the input / output terminal, and the change state of the voltage drop due to the current detection resistor accompanying the energization variable state is changed to the child unit. A bidirectional signal transmission device between a master unit and a slave unit, which is detected by the master unit side microcomputer as a signal from the machine side microcomputer.